CN103335981A - Device for on-line detection of concentration during crystallization of cane sugar - Google Patents
Device for on-line detection of concentration during crystallization of cane sugar Download PDFInfo
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- CN103335981A CN103335981A CN2013102263308A CN201310226330A CN103335981A CN 103335981 A CN103335981 A CN 103335981A CN 2013102263308 A CN2013102263308 A CN 2013102263308A CN 201310226330 A CN201310226330 A CN 201310226330A CN 103335981 A CN103335981 A CN 103335981A
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Abstract
The invention discloses a device for on-line detection of concentration during the crystallization of cane sugar, comprising an on-line refractometer and a conveying and stirring device arranged on the sidewall of a sugar boiling pan. A prism measuring end of the on-line refractometer penetrates through the sidewall of the sugar boiling pan and stretches into the sugar boiling pan. By setting the conveying and stirring device, massecuite deep in the sugar boiling pan is conveyed to the refractometer, and the prism measuring end is washed, and the replacement of the thick massecuite is accelerated, so that the concentration of mother liquid of the massecuite at the measuring end of the refractometer on the edge of the sugar boiling pan and the concentration of the mother liquid of the massecuite in the main body region of the sugar boiling pan keep synchronous parameters. Furthermore, the problem of measurement error caused by the deposition of impurities and crystals at the prism measuring end is solved, so that the on-line refractometer can reflect the change of the mother liquid of the massecuite in the sugar boiling pan timely and accurately. Meanwhile, the concentration of the massecuite required by the crystallization control of the cane sugar can be reflected by the current of a driving motor of the conveying and stirring device, so that on-line detection of the concentration of the mother liquid of the massecuite and the concentration of the massecuite during the crystallization in the sugar boiling pan can be realized. The device provided by the invention is applied in the field of cane sugar production.
Description
Technical field
The present invention relates to the sucrose production technical field, particularly concentration detection apparatus in a kind of boiling pan sugar crystal process.
Background technology
The white granulated sugar product that eats for people is that sucrose solution is condensed into behind the syrup at the boiling pan intercrystalline, separating drying through hydro-extractor again forms, crystallization of sucrose need be controlled the massecuite mother liquor under vacuum condition concentration changes within the specific limits, also will reflect the auxiliary control of massecuite concentration parameter of massecuite mother liquid concentration and massecuite crystal ratio simultaneously.Because material viscosity is big in the boiling pan, impurity is many, brings very big difficulty to instrument measurement, domestic substantially still resting on manually estimated hand by rule of thumb and touched to infer massecuite concentration and massecuite mother liquid concentration state in the sugar crystal process.
Generally adopted instrument such as conductivity meter and flow graph to measure conductivity and the viscosity of massecuite in the past, and then measure massecuite concentration indirectly, conductivity meter mainly is the conductivity (sucrose is non-conductive) that contains conductive materials in the massecuite by measuring, the working curve reflection massecuite concentration of making in the ratio that contains conductive materials in the massecuite error will occur and cause the control failure when the kind content of conductive materials in the raw material; Flow graph mainly is by measuring the viscosity reflection massecuite concentration of massecuite, when material composition and massecuite crystal ratio cause viscosity to change, reflect that error also appears in the massecuite measurement of concetration, accuracy is lower, and the microwave concentration measuring method of development recent years mainly is by measuring massecuite to the moisture of the degree reflection massecuite of the decay of microwave, namely detect massecuite concentration with default working curve, can't the needed mother liquid concentration of independent measurement crystallization of sucrose, reduced accuracy and the reliability of control.
Laboratory, sugar refinery is detected the massecuite mother liquid concentration and at first massecuite is isolated mother liquor at present, measures mother liquor hammer degree with hydrometer method or refractometry again.The hammer degree is a kind of expression mode of concentration, and hydrometer method is that the weight by measuring unit's volume solution is converted to the hammer degree, and accuracy is relatively poor; Refractometry is to pass through total reflection principle, utilize light at the hammer degree of the measurement of angle massecuite mother liquor of the refractometer glass prism surface refraction that contacts with the massecuite mother liquor, because the impurity that exists in the sucrose solution is very little to the influence of sucrose refractive power, so the sucrose solution refractive power hammer degree that refractometry is measured is the most accurately the most at present, it also is laboratory standard sucrose solution hammer degree determination method.
The refractive power hammer degree of massecuite mother liquor can be accurately measured in the laboratory, is to measure with each back cleaning refractometer prism of measuring with the assurance measurement accuracy because the laboratory adopts the filtration massecuite to obtain mother liquor.Yet, adopt the online detection of refractometer to have two problems that are difficult to solve in boiling pan: first refractometer is when boiling pan uses, because the restriction of optical element, the sensor depth that stretches in the boiling pan is little, the massecuite of the thickness that boiling pan keeps to the side flows slowly, the massecuite mother liquor also is difficult to the displacement of flowing on the refractometer prism, the main body massecuite often needs the long period just to flow to the refractometer place in the boiling pan, full-bodied mother liquor is replaced a period of time again on the measuring prism, the massecuite mother liquid concentration that refractometer is measured in real time is the mother liquid concentration before the main body massecuite long period in fact, be that the massecuite mother liquid concentration signal that refractometer is measured has hysteresis quality, the measured value that " hysteresis " of this measurement influences instrument can not in time reflect and control massecuite mother liquid concentration variation in the boiling pan; Its two be impurity in the massecuite can be on the refractometer prism crystal in incrustation and the massecuite also can be deposited on the refractometer prism and cause measuring error.These two problems can't be used refractometer in the on-line measurement of boiling pan crystallization process.
Summary of the invention
Technical matters to be solved by this invention provides a kind of simple in structure and online on-line measuring device of promptly and accurately measuring massecuite mother liquid concentration and massecuite concentration of energy.
For solving the problems of the technologies described above the technical scheme that adopts: concentration on-line measuring device in a kind of sugar crystal process, comprise the online refractometer of being located on the boiling pan sidewall and carry stirring apparatus, online refractometer has a prism measuring junction, the prism measuring junction passes the boiling pan sidewall and stretches in the boiling pan, carry stirring apparatus to comprise the drive motor of being located on the boiling pan sidewall, the output terminal of drive motor is connected with the transmission shaft that stretches in the boiling pan, be provided with at least one propeller shape blade in transmission shaft upper edge propeller shaft length direction, transmission shaft is near the prism measuring junction, online refractometer output massecuite mother liquid concentration signal, the driving motor electric current will convert the output of reflection massecuite concentration signal to by transmitter in the stirring apparatus and will carry.
Be further used as the improvement of technical solution of the present invention, be provided with a plurality of propeller shape blades in transmission shaft upper edge propeller shaft length direction, the spacing distance between each propeller shape blade is less than 15 centimetres.
Be further used as the improvement of technical solution of the present invention, the prism measuring junction and apart from the distance between the nearest propeller shape blade of prism measuring junction less than 15 centimetres.
Beneficial effect: this concentration on-line measuring device carries stirring apparatus to carry and to stir thickness massecuite in the boiling pan by arranging, increase the flowability of the massecuite in the boiling pan, i.e. reinforcement is equipped with the displacement of boiling pan fringe region thickness massecuite and the boiling pan body region thickness massecuite of online refractometer, simultaneously, carry the propeller shape blade that rotates on the stirring apparatus to produce expulsive force and promote massecuite washes away the prism measuring junction surface quickening massecuite mother liquor of online refractometer with certain speed displacement, make the lip-deep massecuite mother liquid concentration of prism measuring junction and the boiling pan body region massecuite mother liquid concentration of the online refractometer that is installed on the boiling pan edge keep synchronization parameter, and then make online refractometer can promptly and accurately reflect the situation of change of massecuite mother liquid concentration in the boiling pan, realize the purpose that the online concentration of online refractometer detects in the boiling pan.On the other hand, can also make impurity and crystal in the boiling pan be difficult to be deposited on the prism measuring junction by carrying the washing away of stirring apparatus, agitaion, further improve the precision of utilizing online refractometer to measure the massecuite mother liquid concentration.Simultaneously, with drive motor as drive source, utilize the size of the electric current of drive motor can reflect the resistance that the rotation of propeller shape blade is subjected to, it is propeller shape blade suffered resistance difference under different massecuite concentration, the drive current of drive motor is also different, the size of current of drive motor can be converted according to the processing of circuit of this principle by routine and to reflect the massecuite concentration signal, online refractometer output massecuite mother liquid concentration signal, to carry drive motor current conversion one-tenth reflection massecuite concentration signal output in the stirring apparatus by transmitter, and utilize the online detection of massecuite mother liquid concentration and massecuite concentration to reach good control effect.
Description of drawings
The present invention is described further below in conjunction with drawings and Examples;
Fig. 1 is embodiment of the invention structural representation;
Fig. 2 is the structural representation of carrying stirring apparatus in the embodiment of the invention.
Embodiment
See figures.1.and.2, the present invention includes the online refractometer of being located on boiling pan 30 sidewalls 10 and carry stirring apparatus 20, online refractometer 10 has a prism measuring junction 11, prism measuring junction 11 passes boiling pan 30 sidewalls and stretches in the boiling pan 30, carry stirring apparatus 20 to comprise the drive motor of being located on boiling pan 30 sidewalls 21, the output terminal of drive motor 21 is connected with the transmission shaft 22 that stretches in the boiling pan 30, be provided with at least one propeller shape blade 23 at transmission shaft 22 upper edge transmission shafts 22 length directions, transmission shaft 22 has angle near prism measuring junction 11 and with prism measuring junction 11.
The prism measuring junction 11 of online refractometer 10 is installed on boiling pan 30 inwalls, optical element structure reason owing to online refractometer 10, thereby limited the degree of depth that prism measuring junction 11 stretches into boiling pan 30, online refractometer 10 mainly utilizes light that automatic light source sends in the concentration of the measurement of angle massecuite mother liquor of the glass prism surface refraction that contacts with the massecuite mother liquor.
Owing to assemble the bigger massecuite of viscosity at boiling pan 30 fringe regions, online refractometer 10 can only on-line measurement goes out the concentration of massecuite mother liquor in boiling pan 30 fringe regions, because the massecuite flowability extreme difference of this zone thickness, massecuite in the boiling pan body region will could arrive the prism measuring junction 11 lip-deep massecuite mother liquors that online refractometer 10 is slowly replaced in this zone again through the long period, carry stirring apparatus 20 by arranging, massecuite in the body region in the boiling pan 30 is transported near the positions online refractometer 10 and goes up the thick liquids that adhere to prism measuring junction 11 surfaces that certain speed washes away online refractometer 10, increase boiling pan 30 interior body region to the massecuite flowability of boiling pan 30 fringe regions, strengthen the displacement of the prism measuring junction 11 surperficial thick liquids of online refractometer 10, make that the massecuite mother liquid concentration at prism measuring junction 11 places and the massecuite mother liquid concentration of boiling pan 30 body region keep synchronously on boiling pan 30 fringe regions, and then make online refractometer 10 can promptly and accurately reflect the situation of change of massecuite mother liquid concentration in the boiling pan 30, reach the purpose that online concentration detects.On the other hand, can also make impurity and crystal in the boiling pan be difficult to be deposited on the prism measuring junction by the agitaion of carrying stirring apparatus 20, further improve the precision of utilizing online refractometer to measure the massecuite mother liquid concentration.
In the present embodiment, carry stirring apparatus 20 to adopt drive motor 21 as drive source, drive motor 21 drives propeller shape blade 23 on the transmission shafts 22 and rotates to carry and stir thickness object (massecuite) in the boiling pan 30, thereby wherein constantly the massecuite in the boiling pan 30 is pushed away to online refractometer 10 places in propeller shape blade 23 rotary courses and reach the purpose that the massecuite in boiling pan 30 body region is carried toward boiling pan 30 fringe regions, the rotation of propeller shape blade 23 simultaneously also to a certain degree drives the mobile displacement of massecuite in the boiling pan 30, make the massecuite mother liquor in the thick liquid keep good circulating property, thereby make that the massecuite mother liquid concentration of body region keeps synchronously substantially in massecuite mother liquid concentration that prism measuring junction 11 near zones detect and boiling pan 30, make online refractometer 10 can promptly and accurately reflect the variation of massecuite mother liquid concentration.
Adopt drive motor 21 as the drive source of carrying stirring apparatus 20 simultaneously, the size of the electric current of drive motor 21 can reflect the resistance that 23 rotations of propeller shape blade are subjected to, propeller shape blade 23 is in different massecuite mother liquid concentrations suffered resistance difference during with different massecuite crystal ratio, the drive current of drive motor 21 is also different, the size of current correspondence that is drive motor 21 reflects massecuite mother liquid concentration and massecuite crystal ratio, processing of circuit by routine can converse the size of current of drive motor 21 massecuite mother liquid concentration and massecuite crystal scaling signal, and then reflect that indirectly massecuite concentration, this reflection massecuite concentration signal are that control boiling pan crystallization process is needed.
As preferred implementation of the present invention, be provided with a plurality of propeller shape blades 23 at transmission shaft 22 upper edge transmission shafts 22 length directions, the spacing distance between each propeller shape blade 23 is less than 15 centimetres.
As preferred implementation of the present invention, prism measuring junction 11 and apart from the distance between the nearest propeller shape blade 23 of prism measuring junction 11 less than 15 centimetres.
When propeller shape blade 23 when being a plurality of, that near the thick liquid displacement that the distance control between prism measuring junction 11 and the nearest stirring vane 23 is conducive in 15 centimetres the prism measuring junction 11 is mobile.Can be at transmission shaft 22 increase and decrease propeller shape blades 23 according to practical condition, spacing distance between each the propeller shape blade 23 on the transmission shaft 22 should keep less than 15 centimetres, if the spacing distance between each propeller shape blade 23 is excessive, the flowability that then is in the thick liquid between the two propeller shape blades 23 reduces the displacement that is unfavorable for thick liquid greatly and flows.
In the actual production, according to different syrup source, determine the upper and lower limit of massecuite mother liquor hammer degree, if massecuite mother liquor hammer degree exceeds the upper limit in the crystallization process, massecuite can produce new small crystals, influences quality and the output of product; If the hammer degree of massecuite mother liquor exceeds lower limit in the crystallization process, crystal is slowly grown up even is dissolved in the massecuite, so it is very important rationally to control in the boiling pan 30 variation within the specific limits of massecuite mother liquid concentration, draw the massecuite mother liquid concentration of body region in the boiling pan 30 in real time by concentration on-line measuring device of the present invention, control on the boiling pan 30 syrup inlet valve or water intaking valve again and open or close to control massecuite mother liquor hammer degree between upper and lower limit, crystal just can comparatively fast be grown up.
Massecuite concentration is relevant with massecuite crystal ratio to the massecuite recurrent state, and mother liquid concentration just often illustrates that the crystal ratio is too high if massecuite concentration is too high, and recurrent state is relatively poor, at this moment can suitably strengthen the syrup inlet amount by the syrup inlet valve; The too low and mother liquid concentration of massecuite concentration just often, illustrate the crystal ratio to cross low and the mother liquor amount is too much, sugar has little time crystallization, easily produces new small crystals in fluctuation of concentration and influences production, at this moment will open water intaking valve massecuite concentration and mother liquor hammer degree are controlled in normal range.
By reference to the accompanying drawings embodiments of the present invention have been done detailed description above, but the invention is not restricted to above-mentioned embodiment, in the ken that described technical field those of ordinary skill possesses, can also under the prerequisite that does not break away from aim of the present invention, make various variations.
Claims (3)
1. concentration on-line measuring device in the sugar crystal process, it is characterized in that: comprise the online refractometer of being located on boiling pan (30) sidewall (10) and carry stirring apparatus (20), described online refractometer (10) has a prism measuring junction (11), described prism measuring junction (11) passes boiling pan (30) sidewall and stretches in the boiling pan (30), described conveying stirring apparatus (20) comprises the drive motor of being located on boiling pan (30) sidewall (21), the output terminal of described drive motor (21) is connected with the transmission shaft (22) that stretches in the boiling pan (30), be provided with at least one propeller shape blade (23) at described transmission shaft (22) upper edge transmission shaft (22) length direction, described transmission shaft (22) is near prism measuring junction (11).
2. concentration on-line measuring device in the sugar crystal process according to claim 1, it is characterized in that: be provided with a plurality of propeller shape blades (23) at described transmission shaft (22) upper edge transmission shaft (22) length direction, the spacing distance between each described propeller shape blade (23) is less than 15 centimetres.
3. concentration on-line measuring device in the sugar crystal process according to claim 2 is characterized in that: described prism measuring junction (11) and apart from the distance between the nearest propeller shape blade (23) of prism measuring junction (11) less than 15 centimetres.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104764743A (en) * | 2015-03-23 | 2015-07-08 | 钦州华成自控设备有限公司 | A brix detector, a brix on-line detection system and a using method |
| CN106769872A (en) * | 2016-12-14 | 2017-05-31 | 钦州华成自控设备有限公司 | A kind of automatic sampling apparatus of sugar refinery brix detector |
| CN107300488A (en) * | 2017-07-25 | 2017-10-27 | 广西农垦糖业集团红河制糖有限公司 | A kind of Semiautomatic intermittent honey material sampling apparatus |
| WO2018172412A1 (en) * | 2017-03-21 | 2018-09-27 | Bjarne Christian Nielsen Holding Aps | Method and apparatus for analysing and controlling a crystallisation process |
| CN108956532A (en) * | 2018-08-13 | 2018-12-07 | 金河生物科技股份有限公司 | A kind of refractometer inductive probe and its application |
| CN111744850A (en) * | 2020-06-03 | 2020-10-09 | 劳莉莉 | Integrated device for automatically cleaning and online detecting sensor probe of hammeter |
| CN111830027A (en) * | 2019-04-17 | 2020-10-27 | 合肥华凌股份有限公司 | Water supply system and refrigerator |
| CN115068972A (en) * | 2021-03-16 | 2022-09-20 | 上海梅山钢铁股份有限公司 | Crystallization tank capable of adjusting solid-liquid ratio of ammonium sulfate mother liquor |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104764743A (en) * | 2015-03-23 | 2015-07-08 | 钦州华成自控设备有限公司 | A brix detector, a brix on-line detection system and a using method |
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| CN106769872A (en) * | 2016-12-14 | 2017-05-31 | 钦州华成自控设备有限公司 | A kind of automatic sampling apparatus of sugar refinery brix detector |
| WO2018172412A1 (en) * | 2017-03-21 | 2018-09-27 | Bjarne Christian Nielsen Holding Aps | Method and apparatus for analysing and controlling a crystallisation process |
| CN107300488A (en) * | 2017-07-25 | 2017-10-27 | 广西农垦糖业集团红河制糖有限公司 | A kind of Semiautomatic intermittent honey material sampling apparatus |
| CN107300488B (en) * | 2017-07-25 | 2023-11-24 | 广西糖业集团红河制糖有限公司 | Semi-automatic intermittent honey sampling device |
| CN108956532A (en) * | 2018-08-13 | 2018-12-07 | 金河生物科技股份有限公司 | A kind of refractometer inductive probe and its application |
| CN108956532B (en) * | 2018-08-13 | 2024-04-05 | 金河生物科技股份有限公司 | Refractometer inductive probe and application thereof |
| CN111830027A (en) * | 2019-04-17 | 2020-10-27 | 合肥华凌股份有限公司 | Water supply system and refrigerator |
| CN111744850A (en) * | 2020-06-03 | 2020-10-09 | 劳莉莉 | Integrated device for automatically cleaning and online detecting sensor probe of hammeter |
| CN115068972A (en) * | 2021-03-16 | 2022-09-20 | 上海梅山钢铁股份有限公司 | Crystallization tank capable of adjusting solid-liquid ratio of ammonium sulfate mother liquor |
| CN115068972B (en) * | 2021-03-16 | 2023-08-15 | 上海梅山钢铁股份有限公司 | Crystallization tank capable of adjusting solid-to-liquid ratio of ammonium sulfate mother liquor |
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Address after: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee after: Institute of bioengineering, Guangdong Academy of Sciences Address before: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee before: GUANGDONG PROVINCIAL BIOENGINEERING INSTITUTE (GUANGZHOU SUGARCANE INDUSTRY RESEARCH INSTITUTE) Address after: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee after: Institute of biological and medical engineering, Guangdong Academy of Sciences Address before: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee before: Institute of bioengineering, Guangdong Academy of Sciences |
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Address after: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee after: GUANGDONG PROVINCIAL BIOENGINEERING INSTITUTE (GUANGZHOU SUGARCANE INDUSTRY RESEARCH INSTITUTE) Address before: 510316 No. 10, shiliugang Road, Guangzhou, Guangdong Patentee before: GUANGZHOU SUGARCANE INDUSTRY Research Institute |